Chemical Injection To Increase Production From Gas Wells

Abstract

There is described a chemical injection system for a natural gas well. An instrument monitors the production of gas from the well and the flow of chemicals injected into the well. The instrument controls the on and off time of a chemical injection pump that is attached to a chemical injection tank. The control is based for certain chemicals such as a surfactant on the gas flow rate in the production piping. The user of the system inserts in the instrument the setpoints associated with the well's flow rate. These setpoints determine for a given flow rate the on time for the chemical injection pump. Other chemicals can also be injected into the well using the system and the injection for those chemicals may be based on other criteria such as temperature, water rate, oil rate or pipeline flow rate.

Description

FIELD OF THE INVENTION[0001]This invention relates to fossil fuel wells and more particularly to the injection of a chemical foamer into the well to promote gas flow from the well.DESCRIPTION OF THE PRIOR ART[0002]Fossil fuel wells are generally limited in their production of natural gas due to naturally occurring fluids such as water that restrict the gas flow by accumulating in the production tubing of the well.[0003]Chemical foamers are injected into a gas well to increase gas production from the well. The foamers are surfactants that are specially designed to regain or increase gas production in a maturing gas well. The foamer builds wet foam in the presence of condensate in the well and thus increases the liquids production of the well and thus the well's gas production.[0004]Other chemicals such as methanol, a H2S scavenger, corrosion inhibitors, scale inhibitors and paraffin inhibitors may also be injected into a gas well.SUMMARY OF THE INVENTION[0005]A system for injecting a...

AI Technical Summary

Benefits of technology

The patent describes a system for injecting a chemical into a natural gas well. The system includes a tank holding the chemical, an injection pump, and an instrument connected to the well to measure various parameters. The instrument controls the injection pump based on these parameters and a predetermined criteria. The technical effect of this system is to efficiently and accurately inject chemicals into natural gas wells, optimizing the flow of gas and reducing the likelihood of blockages or damage to the well.

Problems solved by technology

Fossil fuel wells are generally limited in their production of natural gas due to naturally occurring fluids such as water that restrict the gas flow by accumulating in the production tubing of the well.

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